Re: opacity

Patrick Welche wrote:
> 
> This is probably a FAQ, but I haven't found a solution. Essentially I
> want to do
> 
>   gm convert -mask mask.eps skill.eps out.png
> 
> but try as I may, out.png is not transparent. I tried converting the eps to
> png first, so mask.png is an anti-aliased black ellipse on a white background.
> I then want to say, "make the opacity chanel of out.png the same as the
> (any of R, G or B) channel of mask.png". I can see how you copy say Red to
> Red, or Opacity to Opacity, but not from one to the other. (I have a feeling
> that -mask should do exactly what I want, but it doesn't seem to..)
> 
> Thoughts?

Try putting "-matte" somewhere on the commandline to establish the fact
that the image has an opacity channel.

Glenn


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